Datetime: 2023-01-22 11:50:21 Visit: 0
Soybean oil is one of the most important vegetable oils in the world and is widely used in food processing, catering and home cooking. However, the crude oil originally extracted from soybean oil contains impurities and undesirable ingredients, while the refined soybean oil has higher quality and longer shelf life.
Soybean oil refining is a complex process that aims to remove suspended particles, free fatty acids, phospholipids, and other substances that adversely affect the quality and stability of the oil. The refining process usually includes the following steps:
Dephosphorization: Virgin soybean oil usually contains a lot of non-fat substances, such as protein and carbohydrates. Through degreasing treatment, these non-oily substances can be removed, thus improving the purity of oil products.
Deacidification: In the alkali refining process, the alkali solution is added to the soybean oil to neutralize the free fatty acids and acid values. This helps remove the acid from the oil and improves its color and taste.
Dehydration: Remove the moisture content in the oil, avoid the oxidation reaction between water and other components in the oil, increase the peroxide value, and accelerate the corruption of the oil. Dehydrated oil can be stored for a longer period of time.
Decolorization: Bleaching is an important step to remove impurities and pigments from soybean oil by adding adsorbents such as active clay or activated carbon. This step not only helps to improve the appearance and transparency of the oil, but also reduces oxidation and corruption of the oil.
Deodorization: Deodorization is the final step in the refining process, through steam deodorization to remove unvolatile substances and odors in the oil, improving the taste and flavor of the oil.
Dewaxing: Soybean oil crystallizes and forms waxy substances at low temperatures, which can affect the quality and fluidity of the oil. Through cooling and filtration treatment, the wax in the oil can be removed, so that it remains liquid at lower temperatures.
Therefore, there are many different types of refining equipment for oil processing according to customer needs.
In summary, soybean oil refining is a critical process aimed at improving the quality and stability of the oil. By removing impurities and undesirable ingredients, the refining process enables soybean oil to have a better appearance, taste and shelf life, meeting the demand for high-quality vegetable oils.
